Finding the Fourth Proportional to 22,470.40, 31,015.32 and 13,042

Step by Step Solution

1. Step 1: Write the proportion equation
   22,470.40 : 31,015.32 = 13,042 : x
2. Step 2: Convert to fraction form
   22,470.40/31,015.32 = 13,042/x
3. Step 3: Cross multiply
   22,470.40x = 31,015.32 × 13,042
4. Step 4: Simplify right side
   22,470.40x = 404,501,803.44
5. Step 5: Solve for x
   x = 404,501,803.44/22,470.40
6. Step 6: Final answer
   x = 18,001.54